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(No Model.) 3 Sheets-Sheet 1.

S. RICHARDSON. THERMOMETER AND BAROM ETER.

No. 555,828. Patented Mar. 3, 1896.

(No Model.) I 3 SheetsSheet 2. S. RICHARDSON.

THERMOMETER AND BAROMETER. No. 555,828. Patented Mar. 3, 1896'.

(No Model.) v 3 Sheets-Sheet 3 S. RICHARDSON. THERMDMBTER AND BAROMETBR. No. 555,828. Patented Mar. 3, 1896.

, which the first derstood. The

UNITED STATES- PATENT OFFICE.

SIDNEY RICHARDSON, OF LONDON, ENGLAND.

THERIVIOMETER AND BAROMET ERL SPECIFICATION forming part of Letters Patent No. 555,828, dated March 3, 1893. Application filed November 2,1894. Serial No. 529,666. (No-model.) Patented in England December 15, 1893,11'0. 24,122.

To all whom it may concern:

lie it known thatI, SIDNEY RICHARDSON, a subject of the Queen of Great Britain, residi n g at 356. irixton Road, London ,in the county of Surrey, England, have invented certain new and useful Improvements in'Ther'mometors and Barometers, (for which I have 0bi-ained a patentin Great Britain, No. 24,122,

. l maring date December 1 5, 1803,) of which the i'ollowing is a specification.

The-first part of this invention relates to improvements in those classes of thermometers which have a single U-shaped tube, the bore of which contains mercury, spirit, acid, or other thermometric fluid, together with an index which'is moved up and down within the bore to enable a register of the tempera ture to be kept.

The improvement consists in providing such instrument with an additional parallel bore or bores in the tube, each additional bore containing a further index, which, when accurately set, will register the temperature index registered one, two, or three days previously. This part of my invention is illustrated in the accompanying drawings, in which'- Figure l is a face view of a Sixs thermometer provided with my improvements, and Fig. 2 represents a cross-section of the tube thereof. Fig. 3 is a sectional view of the tube to show more clearly the formation of the bores. Fig. 4 is a side elevation of a barometer-tube provided with my improvement;

we represent, respectively, the two parts of the thermometric bore of asingle U-shaped tube containing any suitable thermometric fluid and indices 1) b of any ordinary or wellknown description, and c 0 represent thetwo parts of an additional parallel bore made within-the same tube as that containing the bore a a and containing other indices (Z d.

The thermometric bore a a communicates with the bulb e and expansiomchamberf, and the two parts are connected together at their lower parts, being made from a single tube bent at the middle of its length, as .is well unpart c of the additional b ore is closed at its upper end-that is to say, it does not-communicate with the bulb e, but at its lower end it communicates with the lower end of the part c of the additional bore,

which communicates with the expansionchamber f.'

In using such a thermometer, after the indices b b have been caused to register by the action of the temperature, the additional indices d d are madeto correspond with the indices b by a magnet, as usual. Then, on the latter moving at a subsequent period, comparison can be made between such indices 5 b and the indicesd d recording previous po- 5 sitionsof the thermometric columns. It will be evident that my invention is equally applicable to a single straight-tube thermometer.

The second part of this invention (see Fig. 4) relates to improvements in that class of barometer which is provided with a single tube g, which has a bore 72, containing a column of mercury 17, indicating the pressure of the atmosphere.

The im provementsconsist in providing one or two additional bores j in the tube, in each of which additional bores is placed an index v is capable of being moved freely up and down within the bore by aid of a magnet, which index or indices,-when accurately set, enable a register to be kept'of the pressure of the atmosphere of one or two days previously.

The barometer-tube is made in similar manner to that for a thermometer, the additional bore or bores being smaller than the barometric bore.

Having fully described my invention, what I desire to claim and secure by Letters Patent is- 1. A single tube for a thermometer or ba rometer having one or more bores additional to the thermometric or barometric bore and provided with one or more additional indices, substantially as described.

2. A single barometric or thermometric tube fo rmed with a plurality of independent bores,

provided respectively with registering devices to be set by meteorological changes and registering devices to be set at will, as explained.

- A sin gleintegral tube for the p urpose'set forth, containing a plurality of distinct parallel bores, and bent to form two parts, said bores containing respectively a medium subject to atmospheric changes, and indicator therefor, and indicators movable at will into I eate, mid bores containing imlivmm's as ex.- positlon corresponding to the indicatlon first planned. mentioned as ex lalned. A ein 'le tube for a lhernunneier or hn- 3 4. Asin le inte raltube for the )urmseset ronleter com )risinu the usual here zunl an v a: C 5 forth, havrng two drstrnet bores throughout addltlonnl parallel bore eontzumngan llHlOX; 15

its length, bent to lform two parallel parts, substzmtinlly as deserined.

and snrmounted'at its respective ends by a SIDNEY .lfil'Q llARDhUX. x pressure-bulb respectively With which one 01. 7 \Vitnusses the bores communion-Les and an expzumion- .13. J. B. Min,

10 bulb with which both of the bores e0n11nnnl- CLAUDE K. MLLLS. 

